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74 lines
1.2 KiB
NASM
74 lines
1.2 KiB
NASM
; classic RC2014 setup (8K ROM + 32K RAM) and a stock Serial I/O module
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; The RAM module is selected on A15, so it has the range 0x8000-0xffff
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.equ RAMSTART 0x8000
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.equ RAMEND 0xffff
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.equ ACIA_CTL 0x80 ; Control and status. RS off.
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.equ ACIA_IO 0x81 ; Transmit. RS on.
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jp init
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; interrupt hook
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.fill 0x38-$
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jp aciaInt
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.inc "err.h"
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.inc "core.asm"
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.inc "parse.asm"
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.equ ACIA_RAMSTART RAMSTART
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.inc "acia.asm"
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.equ MMAP_START 0xd000
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.inc "mmap.asm"
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.equ BLOCKDEV_RAMSTART ACIA_RAMEND
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.equ BLOCKDEV_COUNT 1
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.inc "blockdev.asm"
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; List of devices
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.dw mmapGetC, mmapPutC
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.equ STDIO_RAMSTART BLOCKDEV_RAMEND
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.inc "stdio.asm"
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.equ AT28W_RAMSTART STDIO_RAMEND
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.inc "at28w/main.asm"
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.equ SHELL_RAMSTART AT28W_RAMEND
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.equ SHELL_EXTRA_CMD_COUNT 5
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.inc "shell.asm"
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; Extra cmds
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.dw a28wCmd
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.dw blkBselCmd, blkSeekCmd, blkLoadCmd, blkSaveCmd
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.inc "blockdev_cmds.asm"
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init:
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di
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; setup stack
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ld hl, RAMEND
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ld sp, hl
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im 1
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call aciaInit
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ld hl, aciaGetC
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ld de, aciaPutC
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call stdioInit
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call shellInit
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xor a
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ld de, BLOCKDEV_SEL
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call blkSel
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ei
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jp shellLoop
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a28wCmd:
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.db "a28w", 0b011, 0b001, 0
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ld a, (hl)
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ld (AT28W_MAXBYTES), a
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inc hl
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ld a, (hl)
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ld (AT28W_MAXBYTES+1), a
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jp at28wInner
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